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args.c
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args.c
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/*
Copyright (C) 2001-2011, Parrot Foundation.
=head1 NAME
src/call/args.c
=head1 DESCRIPTION
B<Arguments and Returns>: Functions in this file handle argument/return value
passing to and from subroutines following the Parrot Calling Conventions.
=head1 FUNCTIONS
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/oplib/ops.h"
#include "args.str"
#include "pmc/pmc_key.h"
#include "pmc/pmc_fixedintegerarray.h"
#include "pmc/pmc_callcontext.h"
/* HEADERIZER HFILE: include/parrot/call.h */
/*
Set of functions used in generic versions of fill_params and fill_returns.
*/
typedef INTVAL* (*intval_ptr_func_t)(PARROT_INTERP, void *arg_info, INTVAL index);
typedef FLOATVAL* (*numval_ptr_func_t)(PARROT_INTERP, void *arg_info, INTVAL index);
typedef STRING** (*string_ptr_func_t)(PARROT_INTERP, void *arg_info, INTVAL index);
typedef PMC** (*pmc_ptr_func_t) (PARROT_INTERP, void *arg_info, INTVAL index);
typedef INTVAL (*intval_func_t)(PARROT_INTERP, void *arg_info, INTVAL index);
typedef FLOATVAL (*numval_func_t)(PARROT_INTERP, void *arg_info, INTVAL index);
typedef STRING* (*string_func_t)(PARROT_INTERP, void *arg_info, INTVAL index);
typedef PMC* (*pmc_func_t) (PARROT_INTERP, void *arg_info, INTVAL index);
typedef struct pcc_funcs_ptr {
intval_ptr_func_t intval;
numval_ptr_func_t numval;
string_ptr_func_t string;
pmc_ptr_func_t pmc;
intval_func_t intval_constant;
numval_func_t numval_constant;
string_func_t string_constant;
pmc_func_t pmc_constant;
} pcc_funcs_ptr;
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
static void assign_default_param_value(PARROT_INTERP,
INTVAL param_index,
INTVAL param_flags,
ARGIN(void *arg_info),
ARGIN(const struct pcc_funcs_ptr *accessor))
__attribute__nonnull__(1)
__attribute__nonnull__(4)
__attribute__nonnull__(5);
static void dissect_aggregate_arg(PARROT_INTERP,
ARGMOD(PMC *call_object),
ARGIN(PMC *aggregate))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*call_object);
static void extract_named_arg_from_op(PARROT_INTERP,
ARGMOD(PMC *call_object),
ARGIN(STRING *name),
ARGIN(PMC *raw_sig),
ARGIN(opcode_t *raw_args),
INTVAL arg_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
__attribute__nonnull__(5)
FUNC_MODIFIES(*call_object);
static void fill_params(PARROT_INTERP,
ARGMOD_NULLOK(PMC *call_object),
ARGIN(PMC *raw_sig),
ARGIN(void *arg_info),
ARGIN(const struct pcc_funcs_ptr *accessor),
Errors_classes direction)
__attribute__nonnull__(1)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
__attribute__nonnull__(5)
FUNC_MODIFIES(*call_object);
PARROT_WARN_UNUSED_RESULT
static INTVAL intval_constant_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
static INTVAL intval_constant_from_varargs(PARROT_INTERP,
ARGIN(void *data),
INTVAL index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static INTVAL* intval_param_from_c_args(PARROT_INTERP,
ARGIN(va_list *args),
INTVAL param_index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static INTVAL* intval_param_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_COLD
PARROT_DOES_NOT_RETURN
static void named_argument_arity_error(PARROT_INTERP,
int named_arg_count,
ARGFREE(Hash *named_used_list),
ARGIN(Hash *named_arg_list))
__attribute__nonnull__(1)
__attribute__nonnull__(4);
PARROT_WARN_UNUSED_RESULT
static FLOATVAL numval_constant_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
static FLOATVAL numval_constant_from_varargs(PARROT_INTERP,
ARGIN(void *data),
INTVAL index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static FLOATVAL* numval_param_from_c_args(PARROT_INTERP,
ARGIN(va_list *args),
INTVAL param_index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static FLOATVAL* numval_param_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void parse_signature_string(PARROT_INTERP,
ARGIN(const char *signature),
ARGMOD(PMC **arg_flags))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*arg_flags);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* pmc_constant_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static PMC* pmc_constant_from_varargs(PARROT_INTERP,
ARGIN(void *data),
INTVAL index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC** pmc_param_from_c_args(PARROT_INTERP,
ARGIN(va_list *args),
INTVAL param_index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC** pmc_param_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void set_call_from_varargs(PARROT_INTERP,
ARGIN(PMC *signature),
ARGIN(const char *sig),
ARGMOD(va_list *args))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*args);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static STRING* string_constant_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static STRING* string_constant_from_varargs(PARROT_INTERP,
ARGIN(void *data),
INTVAL index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING** string_param_from_c_args(PARROT_INTERP,
ARGIN(va_list *args),
INTVAL param_index)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING** string_param_from_op(PARROT_INTERP,
ARGIN(const opcode_t *raw_params),
INTVAL param_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
#define ASSERT_ARGS_assign_default_param_value __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(arg_info) \
, PARROT_ASSERT_ARG(accessor))
#define ASSERT_ARGS_dissect_aggregate_arg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(call_object) \
, PARROT_ASSERT_ARG(aggregate))
#define ASSERT_ARGS_extract_named_arg_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(call_object) \
, PARROT_ASSERT_ARG(name) \
, PARROT_ASSERT_ARG(raw_sig) \
, PARROT_ASSERT_ARG(raw_args))
#define ASSERT_ARGS_fill_params __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_sig) \
, PARROT_ASSERT_ARG(arg_info) \
, PARROT_ASSERT_ARG(accessor))
#define ASSERT_ARGS_intval_constant_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_intval_constant_from_varargs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(data_unused))
#define ASSERT_ARGS_intval_param_from_c_args __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(args))
#define ASSERT_ARGS_intval_param_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_named_argument_arity_error __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(named_arg_list))
#define ASSERT_ARGS_numval_constant_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_numval_constant_from_varargs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(data_unused))
#define ASSERT_ARGS_numval_param_from_c_args __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(args))
#define ASSERT_ARGS_numval_param_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_parse_signature_string __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(signature) \
, PARROT_ASSERT_ARG(arg_flags))
#define ASSERT_ARGS_pmc_constant_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_pmc_constant_from_varargs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(data_unused))
#define ASSERT_ARGS_pmc_param_from_c_args __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(args))
#define ASSERT_ARGS_pmc_param_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_set_call_from_varargs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(signature) \
, PARROT_ASSERT_ARG(sig) \
, PARROT_ASSERT_ARG(args))
#define ASSERT_ARGS_string_constant_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
#define ASSERT_ARGS_string_constant_from_varargs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(data_unused))
#define ASSERT_ARGS_string_param_from_c_args __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(args))
#define ASSERT_ARGS_string_param_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(raw_params))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
=item C<PMC* Parrot_pcc_build_sig_object_from_op(PARROT_INTERP, PMC *signature,
PMC *raw_sig, opcode_t *raw_args)>
Take a raw signature and argument list from a set_args opcode and
convert it to a CallContext PMC.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_sig_object_from_op(PARROT_INTERP, ARGIN_NULLOK(PMC *signature),
ARGIN(PMC *raw_sig), ARGIN(opcode_t *raw_args))
{
ASSERT_ARGS(Parrot_pcc_build_sig_object_from_op)
PMC * const ctx = CURRENT_CONTEXT(interp);
PMC *call_object;
INTVAL *int_array;
INTVAL arg_count;
INTVAL arg_index = 0;
INTVAL arg_named_count = 0;
if (UNLIKELY(PMC_IS_NULL(signature)))
call_object = Parrot_pmc_new(interp, enum_class_CallContext);
else {
call_object = signature;
VTABLE_morph(interp, call_object, PMCNULL);
}
/* this macro is much, much faster than the VTABLE STRING comparisons */
PARROT_GC_WRITE_BARRIER(interp, call_object);
SETATTR_CallContext_arg_flags(interp, call_object, raw_sig);
GETATTR_FixedIntegerArray_size(interp, raw_sig, arg_count);
GETATTR_FixedIntegerArray_int_array(interp, raw_sig, int_array);
for (; arg_index < arg_count; ++arg_index) {
const INTVAL arg_flags = int_array[arg_index];
const int constant = 0 != PARROT_ARG_CONSTANT_ISSET(arg_flags);
const INTVAL raw_index = raw_args[arg_index + 2];
if (arg_named_count && !(arg_flags & PARROT_ARG_NAME))
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"named arguments must follow all positional arguments");
switch (PARROT_ARG_TYPE_MASK_MASK(arg_flags)) {
case PARROT_ARG_INTVAL:
VTABLE_push_integer(interp, call_object, constant
? raw_index
: CTX_REG_INT(interp, ctx, raw_index));
break;
case PARROT_ARG_FLOATVAL:
VTABLE_push_float(interp, call_object, constant
? Parrot_pcc_get_num_constant(interp, ctx, raw_index)
: CTX_REG_NUM(interp, ctx, raw_index));
break;
case PARROT_ARG_STRING:
{
STRING * const string_value = constant
? Parrot_pcc_get_string_constant(interp, ctx, raw_index)
: CTX_REG_STR(interp, ctx, raw_index);
if (arg_flags & PARROT_ARG_NAME) {
++arg_index;
++arg_named_count;
if (!PMC_IS_NULL(call_object)
&& VTABLE_exists_keyed_str(interp, call_object, string_value)) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"duplicate named argument in call");
}
extract_named_arg_from_op(interp, call_object, string_value,
raw_sig, raw_args, arg_index);
}
else
VTABLE_push_string(interp, call_object, string_value);
break;
}
case PARROT_ARG_PMC:
{
PMC * const pmc_value = constant
? Parrot_pcc_get_pmc_constant(interp, ctx, raw_index)
: CTX_REG_PMC(interp, ctx, raw_index);
if (arg_flags & PARROT_ARG_FLATTEN) {
dissect_aggregate_arg(interp, call_object, pmc_value);
}
else {
VTABLE_push_pmc(interp, call_object, pmc_value);
}
break;
}
default:
break;
}
}
return call_object;
}
/*
=item C<static void extract_named_arg_from_op(PARROT_INTERP, PMC *call_object,
STRING *name, PMC *raw_sig, opcode_t *raw_args, INTVAL arg_index)>
Pulls in the next argument from a set_args opcode, and sets it as the
value of a named argument in the CallContext PMC.
=cut
*/
static void
extract_named_arg_from_op(PARROT_INTERP, ARGMOD(PMC *call_object), ARGIN(STRING *name),
ARGIN(PMC *raw_sig), ARGIN(opcode_t *raw_args), INTVAL arg_index)
{
ASSERT_ARGS(extract_named_arg_from_op)
PMC * const ctx = CURRENT_CONTEXT(interp);
const INTVAL arg_flags = VTABLE_get_integer_keyed_int(interp, raw_sig, arg_index);
const int constant = 0 != PARROT_ARG_CONSTANT_ISSET(arg_flags);
const INTVAL raw_index = raw_args[arg_index + 2];
switch (PARROT_ARG_TYPE_MASK_MASK(arg_flags)) {
case PARROT_ARG_INTVAL:
VTABLE_set_integer_keyed_str(interp, call_object, name, constant
? raw_index
: CTX_REG_INT(interp, ctx, raw_index));
break;
case PARROT_ARG_FLOATVAL:
VTABLE_set_number_keyed_str(interp, call_object, name, constant
? Parrot_pcc_get_num_constant(interp, ctx, raw_index)
: CTX_REG_NUM(interp, ctx, raw_index));
break;
case PARROT_ARG_STRING:
VTABLE_set_string_keyed_str(interp, call_object, name, constant
? Parrot_pcc_get_string_constant(interp, ctx, raw_index)
: CTX_REG_STR(interp, ctx, raw_index));
break;
case PARROT_ARG_PMC:
VTABLE_set_pmc_keyed_str(interp, call_object, name, constant
? Parrot_pcc_get_pmc_constant(interp, ctx, raw_index)
: CTX_REG_PMC(interp, ctx, raw_index));
break;
default:
break;
}
}
/*
=item C<static void dissect_aggregate_arg(PARROT_INTERP, PMC *call_object, PMC
*aggregate)>
Takes an aggregate PMC and splits it up into individual arguments,
adding each one to the CallContext PMC. If the aggregate is an array,
its elements are added as positional arguments. If the aggregate is a
hash, its key/value pairs are added as named arguments.
=cut
*/
static void
dissect_aggregate_arg(PARROT_INTERP, ARGMOD(PMC *call_object), ARGIN(PMC *aggregate))
{
ASSERT_ARGS(dissect_aggregate_arg)
if (VTABLE_does(interp, aggregate, CONST_STRING(interp, "array"))) {
const INTVAL elements = VTABLE_elements(interp, aggregate);
INTVAL index;
for (index = 0; index < elements; ++index) {
VTABLE_push_pmc(interp, call_object,
VTABLE_get_pmc_keyed_int(interp, aggregate, index));
}
}
else if (VTABLE_does(interp, aggregate, CONST_STRING(interp, "hash"))) {
const Hash * const hash = (Hash *)VTABLE_get_pointer(interp, aggregate);
parrot_hash_iterate(hash,
VTABLE_set_pmc_keyed_str(interp, call_object,
(STRING *)_bucket->key,
Parrot_hash_value_to_pmc(interp, hash, _bucket->value)););
}
else {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"flattened parameters must be a hash or array");
}
}
/*
=item C<void Parrot_pcc_set_call_from_c_args(PARROT_INTERP, PMC *signature,
const char *sig, ...)>
Converts a variable list of C args into an existent CallContext PMC.
The CallContext stores the original short signature string and an array of
integer types to pass on to the multiple dispatch search.
=cut
*/
PARROT_EXPORT
void
Parrot_pcc_set_call_from_c_args(PARROT_INTERP,
ARGIN(PMC *signature), ARGIN(const char *sig), ...)
{
ASSERT_ARGS(Parrot_pcc_set_call_from_c_args)
va_list args;
va_start(args, sig);
Parrot_pcc_set_call_from_varargs(interp, signature,
sig, &args);
va_end(args);
}
/*
=item C<PMC* Parrot_pcc_build_call_from_c_args(PARROT_INTERP, PMC *signature,
const char *sig, ...)>
Converts a variable list of C args into a CallContext PMC, creating a new one
if needed. The CallContext stores the original short signature string and an
array of integer types to pass on to the multiple dispatch search.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_call_from_c_args(PARROT_INTERP,
ARGIN_NULLOK(PMC *signature), ARGIN(const char *sig), ...)
{
ASSERT_ARGS(Parrot_pcc_build_call_from_c_args)
PMC *call_object;
va_list args;
va_start(args, sig);
call_object = Parrot_pcc_build_call_from_varargs(interp, signature,
sig, &args);
va_end(args);
return call_object;
}
/*
=item C<static void set_call_from_varargs(PARROT_INTERP, PMC *signature, const
char *sig, va_list *args)>
Helper for Parrot_pcc_build_call_from_varargs and Parrot_pcc_set_call_from_varargs.
=cut
*/
static void
set_call_from_varargs(PARROT_INTERP,
ARGIN(PMC *signature), ARGIN(const char *sig),
ARGMOD(va_list *args))
{
ASSERT_ARGS(set_call_from_varargs)
PMC *arg_flags = PMCNULL;
INTVAL i = 0;
parse_signature_string(interp, sig, &arg_flags);
SETATTR_CallContext_arg_flags(interp, signature, arg_flags);
/* Process the varargs list */
for (; sig[i] != '\0'; ++i) {
const INTVAL type = sig[i];
/* Regular arguments just set the value */
switch (type) {
case 'P':
{
const INTVAL type_lookahead = sig[i+1];
PMC * const pmc_arg = va_arg(*args, PMC *);
if (type_lookahead == 'f') {
dissect_aggregate_arg(interp, signature, pmc_arg);
++i; /* skip 'f' */
}
else if (type_lookahead == 'i') {
if (i)
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"Dispatch: only the first argument can be an invocant");
else {
VTABLE_push_pmc(interp, signature, pmc_arg);
++i; /* skip 'i' */
}
}
else
VTABLE_push_pmc(interp, signature, pmc_arg);
break;
}
case 'S':
VTABLE_push_string(interp, signature, va_arg(*args, STRING *));
break;
case 'I':
VTABLE_push_integer(interp, signature, va_arg(*args, INTVAL));
break;
case 'N':
VTABLE_push_float(interp, signature, va_arg(*args, FLOATVAL));
break;
case '-':
return;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"Dispatch: invalid argument type %c!", type);
}
}
}
/*
=item C<void Parrot_pcc_set_call_from_varargs(PARROT_INTERP, PMC *signature,
const char *sig, va_list *args)>
Converts a varargs list into an existent CallContext PMC.
The CallContext stores the original short signature string and an array of
integer types to pass on to the multiple dispatch search.
=cut
*/
PARROT_EXPORT
void
Parrot_pcc_set_call_from_varargs(PARROT_INTERP,
ARGIN(PMC *signature), ARGIN(const char *sig),
ARGMOD(va_list *args))
{
ASSERT_ARGS(Parrot_pcc_set_call_from_varargs)
PARROT_ASSERT(PMCNULL != signature);
VTABLE_morph(interp, signature, PMCNULL);
set_call_from_varargs(interp, signature, sig, args);
}
/*
=item C<PMC* Parrot_pcc_build_call_from_varargs(PARROT_INTERP, PMC *signature,
const char *sig, va_list *args)>
Converts a varargs list into a CallContext PMC, creating a new one if needed.
The CallContext stores the original short signature string and an array of
integer types to pass on to the multiple dispatch search.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_call_from_varargs(PARROT_INTERP,
ARGIN_NULLOK(PMC *signature), ARGIN(const char *sig),
ARGMOD(va_list *args))
{
ASSERT_ARGS(Parrot_pcc_build_call_from_varargs)
PMC *call_object;
if (PMC_IS_NULL(signature))
call_object = Parrot_pmc_new(interp, enum_class_CallContext);
else {
call_object = signature;
VTABLE_morph(interp, call_object, PMCNULL);
}
set_call_from_varargs(interp, call_object, sig, args);
return call_object;
}
/*
=item C<PMC* Parrot_pcc_build_sig_object_from_varargs(PARROT_INTERP, PMC *obj,
const char *sig, va_list args)>
Converts a varargs list into a CallContext PMC. The CallContext stores the
original short signature string and an array of integer types to pass on to the
multiple dispatch search.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_sig_object_from_varargs(PARROT_INTERP, ARGIN_NULLOK(PMC *obj),
ARGIN(const char *sig), va_list args)
{
ASSERT_ARGS(Parrot_pcc_build_sig_object_from_varargs)
PMC * arg_flags = PMCNULL;
PMC * const call_object = Parrot_pmc_new(interp, enum_class_CallContext);
INTVAL in_return_sig = 0;
INTVAL i;
int append_pi = 1;
/* empty args or empty returns */
if (*sig == '-' || *sig == '\0')
return call_object;
parse_signature_string(interp, sig, &arg_flags);
SETATTR_CallContext_arg_flags(interp, call_object, arg_flags);
/* Process the varargs list */
for (i = 0; sig[i] != '\0'; ++i) {
const INTVAL type = sig[i];
/* Don't process returns */
if (in_return_sig)
break;
/* Regular arguments just set the value */
switch (type) {
case 'I':
VTABLE_push_integer(interp, call_object, va_arg(args, INTVAL));
break;
case 'N':
VTABLE_push_float(interp, call_object, va_arg(args, FLOATVAL));
break;
case 'S':
VTABLE_push_string(interp, call_object, va_arg(args, STRING *));
break;
case 'P':
{
const INTVAL type_lookahead = sig[i+1];
PMC * const pmc_arg = va_arg(args, PMC *);
if (type_lookahead == 'f') {
dissect_aggregate_arg(interp, call_object, pmc_arg);
++i; /* skip 'f' */
}
else {
VTABLE_push_pmc(interp, call_object, pmc_arg);
if (type_lookahead == 'i') {
if (i != 0)
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"Dispatch: only the first argument "
"can be an invocant");
++i; /* skip 'i' */
append_pi = 0; /* Don't prepend Pi to signature */
}
}
break;
}
case '-':
in_return_sig = 1;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"Dispatch: invalid argument type %c!", type);
}
}
/* Add invocant to the front of the arguments iff needed */
if (!PMC_IS_NULL(obj) && append_pi)
VTABLE_unshift_pmc(interp, call_object, obj);
return call_object;
}
/*
=item C<static void fill_params(PARROT_INTERP, PMC *call_object, PMC *raw_sig,
void *arg_info, const struct pcc_funcs_ptr *accessor, Errors_classes direction)>
Gets args for the current function call and puts them into position.
First it gets the positional non-slurpy parameters, then the positional
slurpy parameters, then the named parameters, and finally the named
slurpy parameters.
=cut
*/
static void
fill_params(PARROT_INTERP, ARGMOD_NULLOK(PMC *call_object),
ARGIN(PMC *raw_sig), ARGIN(void *arg_info),
ARGIN(const struct pcc_funcs_ptr *accessor),
Errors_classes direction)
{
ASSERT_ARGS(fill_params)
INTVAL *raw_params;
Hash *named_used_list = NULL;
INTVAL param_index = 0;
INTVAL arg_index = 0;
INTVAL named_count = 0;
INTVAL param_count;
INTVAL positional_args;
/* Check if we should be throwing errors. This is configured separately
* for parameters and return values. */
const INTVAL err_check = PARROT_ERRORS_test(interp, direction);
GETATTR_FixedIntegerArray_size(interp, raw_sig, param_count);
/* Get number of positional args */
if (UNLIKELY(PMC_IS_NULL(call_object))) {
/* A null call object is fine if there are no arguments and no returns. */
if (LIKELY(param_count == 0))
return;
if (err_check) {
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"too few arguments: 0 passed, %d expected", param_count);
}
positional_args = 0;
call_object = NULL; /* so we don't need to use PMC_IS_NULL below */
}
else {
GETATTR_CallContext_num_positionals(interp, call_object, positional_args);
}
GETATTR_FixedIntegerArray_int_array(interp, raw_sig, raw_params);
/* EXPERIMENTAL! This block adds provisional :call_sig param support on the
callee side only. Does not add :call_sig arg support on the caller side.
This is not the final form of the algorithm, but should provide the
tools that HLL designers need in the interim. */
if (LIKELY(param_count > 2 || param_count == 0))
/* help branch predictors */;
else {
const INTVAL second_flag = raw_params[param_count - 1];
if (second_flag & PARROT_ARG_CALL_SIG) {
*accessor->pmc(interp, arg_info, param_count - 1) = call_object ? call_object : PMCNULL;
if (param_count == 1)
return;
}
}
/* First iterate over positional args and positional parameters. */
while (param_index < param_count) {
INTVAL param_flags = raw_params[param_index];
/* If it's a call_sig, we're done. */
if (param_flags & PARROT_ARG_CALL_SIG)
return;
/* If the parameter is slurpy, collect all remaining positional
* arguments into an array.*/
if (param_flags & PARROT_ARG_SLURPY_ARRAY) {
/* Can't handle named slurpy here, go to named argument handling */
if (!(param_flags & PARROT_ARG_NAME)) {
PMC *collect_positional;
int j;
INTVAL num_positionals = positional_args - arg_index;
if (num_positionals < 0)
num_positionals = 0;
if (named_count > 0) {
if (named_used_list != NULL)
Parrot_hash_destroy(interp, named_used_list);
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"named parameters must follow all positional parameters");
}
collect_positional = Parrot_pmc_new_init_int(interp,
Parrot_hll_get_ctx_HLL_type(interp, enum_class_ResizablePMCArray),
num_positionals);
for (j = 0; arg_index < positional_args; ++arg_index)
VTABLE_set_pmc_keyed_int(interp, collect_positional, j++,
VTABLE_get_pmc_keyed_int(interp, call_object, arg_index));
*accessor->pmc(interp, arg_info, param_index) = collect_positional;
++param_index;
}
break; /* Terminate the positional arg loop. */
}
/* We have a positional argument, fill the parameter with it. */
if (arg_index < positional_args) {
/* Fill a named parameter with a positional argument. */
if (param_flags & PARROT_ARG_NAME) {
STRING *param_name;
if (!(param_flags & PARROT_ARG_STRING)) {
if (named_used_list != NULL)
Parrot_hash_destroy(interp, named_used_list);
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"named parameters must have a name specified");
}
param_name = PARROT_ARG_CONSTANT_ISSET(param_flags)
? accessor->string_constant(interp, arg_info, param_index)
: *accessor->string(interp, arg_info, param_index);
++named_count;
++param_index;
if (param_index >= param_count)
continue;
param_flags = raw_params[param_index];
/* Mark the name as used, cannot be filled again. */
if (named_used_list == NULL) /* Only created if needed. */
named_used_list = Parrot_hash_create(interp,
enum_type_INTVAL, Hash_key_type_STRING);
Parrot_hash_put(interp, named_used_list, param_name, (void *)1);
}
/* XXX Big L1 instr fetch miss */
else if (named_count > 0) {
if (named_used_list != NULL)
Parrot_hash_destroy(interp, named_used_list);
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"named parameters must follow all positional parameters");
}
/* Check for :lookahead parameter goes here. */
/* Go ahead and fill the parameter with a positional argument. */
switch (PARROT_ARG_TYPE_MASK_MASK(param_flags)) {
case PARROT_ARG_PMC:
*accessor->pmc(interp, arg_info, param_index) =
VTABLE_get_pmc_keyed_int(interp, call_object, arg_index);
break;
case PARROT_ARG_STRING:
*accessor->string(interp, arg_info, param_index) =
VTABLE_get_string_keyed_int(interp, call_object, arg_index);
break;
case PARROT_ARG_INTVAL:
*accessor->intval(interp, arg_info, param_index) =
VTABLE_get_integer_keyed_int(interp, call_object, arg_index);
break;
case PARROT_ARG_FLOATVAL:
*accessor->numval(interp, arg_info, param_index) =
VTABLE_get_number_keyed_int(interp, call_object, arg_index);
break;
default:
if (named_used_list != NULL)
Parrot_hash_destroy(interp, named_used_list);
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION, "invalid parameter type");
break;
}
/* Mark the option flag for the filled parameter. */
if (param_flags & PARROT_ARG_OPTIONAL) {
if (param_index + 1 < param_count) {
const int next_param_flags = raw_params[param_index + 1];
if (next_param_flags & PARROT_ARG_OPT_FLAG) {
++param_index;
*accessor->intval(interp, arg_info, param_index) = 1;
}
}
}
}
/* We have no more positional arguments, fill the optional parameter
* with a default value. */
else if (param_flags & PARROT_ARG_OPTIONAL) {
/* We don't handle optional named params here, handle them in the
* next loop. */
if (param_flags & PARROT_ARG_NAME)
break;
assign_default_param_value(interp, param_index, param_flags,
arg_info, accessor);
/* Mark the option flag for the parameter to FALSE, it was filled
* with a default value. */
if (param_index + 1 < param_count) {
const INTVAL next_param_flags = raw_params[param_index + 1];
if (next_param_flags & PARROT_ARG_OPT_FLAG) {
++param_index;
*accessor->intval(interp, arg_info, param_index) = 0;
}
}